<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>计算属性setter</title>
    <script src="/js/vue.js"></script>
</head>
<body>
    <div id="app">
        <p>First name:<input type="text" v-model="firstName"></p>
        <p>Last name:<input type="text" v-model="lastName"></p>
        <p>fullname:{{fullname}}</p>
        <button @click="change">改变fullname</button>
    </div>
</body>
<script>
    var vm = new Vue({
        el:'#app',
        data:{
            firstName:'',
            lastName:''
        },
        methods:{
            change(){
                this.fullname = 'Harry Potter';
            }
        },
        computed:{
            fullname:{
                //getter用于读取
                get:function(){
                    return this.firstName + ' ' + this.lastName;
                },
                //setter写入时触发
                set:function(newVal){
                    var arr = newVal.split(' ');
                    this.firstName = arr[0];
                    this.lastName = arr[1];

                }
            }
        }
    })
</script>
</html>